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@ARTICLE{Herbst:51898,
      author       = {Herbst, M. and Diekkrüger, B. and Vanderborght, J.},
      title        = {{N}umerical experiments on the sensitivity of runoff
                      generation to the spatial variation of soil hydraulic
                      properties},
      journal      = {Journal of hydrology},
      volume       = {326},
      issn         = {0022-1694},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-51898},
      pages        = {43 - 58},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Spatially distributed soil hydraulic properties are
                      required for distributed hydrological modelling. These soil
                      hydraulic properties are known to vary significantly in
                      space, and considering the non-linearity of runoff
                      generation, the question arises how the spatial variation of
                      soil hydraulic parameters affects the continuous runoff
                      modelling for a micro-scale catchment. This was analysed by
                      applying a three-dimensional hydrological model to the 28.6
                      ha 'Berrensiefen' catchment, Germany, for a simulation
                      period of one year. The model was based on an observed
                      distribution of soil hydraulic properties, which were
                      assumed to be layered in vertical and to vary continuously
                      in horizontal direction, and validated for total runoff.
                      Numerical experiments with five spatial distributions of
                      soil hydraulic parameters derived from the observed spatial
                      distribution, which was supposed to be the 'true' underlying
                      spatial variation, were carried out. These five spatial
                      concepts were: choropleth map, spatially homogeneous case,
                      random distribution, stochastic simulation and conditional
                      stochastic simulation. The comparative modelling revealed a
                      significant sensitivity of runoff generation towards the
                      spatial variation of soil hydraulic properties. The
                      comparison of the hydrograph of surface and macropore runoff
                      to the initial model runs exhibited the highest root mean
                      square error with 1.3 mm h(-1) for the homogeneous case.
                      Further we detected, that the frequency distribution of soil
                      hydraulic properties played an important role for the
                      reproduction of runoff amounts. But also the spatial
                      topology (deterministic spatial variation) was relevant for
                      an adequate description of runoff generation. Conditional
                      stochastic simulation is seen as a promising approach,
                      because it preserved both, the frequency distribution and
                      the deterministic variation. (c) 2005 Elsevier B.V. All
                      rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {ICG-IV},
      ddc          = {690},
      cid          = {I:(DE-Juel1)VDB50},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Engineering, Civil / Geosciences, Multidisciplinary / Water
                      Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000238776800003},
      doi          = {10.1016/j.jhydrol.2005.10.036},
      url          = {https://juser.fz-juelich.de/record/51898},
}